Windows Update Delivery Optimization helps you get Windows updates and Microsoft Store apps more quickly and reliably. You’re in control over whether you use Delivery Optimization with the settings described in this article.

Data Execution Prevention (DEP) is a technology built into Windows that helps protect you from malicious code launching from areas of memory that have been designated as for data only.

Use the Input button on your TV’s remote control to switch the input source of your receiver away from the console and then back (for example, HDMI1 to HDMI2, then back to HDMI1).

在 Windows 8.1 或 Windows RT 8.1 中查找操作系统信息. 要查找设备运行的 Windows 版本，请按 Windows 徽标键 键 + R，并在“打开”框中键入“winver”，然后选择“确定”。. 如果你的设备运行的是 Windows 8.1 或 Windows RT 8.1，那么有关详细信息，可以参阅以下内容：

Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

沉浸式阅读器中的文本首选项. 从各种文本和颜色选项（如文本大小、文本间距和页面主题）中进行选择，以增强沉浸式阅读器体验。. 从沉浸式阅读器工具栏的文本首选项中查找这些设置。. 文本大小：在“ 文本大小”标签下，向右移动滑块以使文本更大;将其向左移动，使文本变小。

Choose from a variety of Surface devices and accessories to get help.

When an update is available in the Teams desktop app, it'll appear at the top of your Teams window. To update, select Update > Update and restart Teams .. Teams will automatically close and update.

Reinstall OneDrive for Windows. The OneDrive app comes with Windows 8.1 and Windows RT 8.1 and cannot be uninstalled, but you can uninstall OneDrive from Windows 7, Windows Vista and some versions of Windows 10.

For all Surface models Before you start, make sure you don’t have any other USB devices connected to your Surface, including USB mouse devices, keyboards, or other storage drives.